Cyclone construction for a surface cleaning apparatus

ABSTRACT

The surface cleaning apparatus includes a cyclone positioned in am air flow passage. The cyclone has a cyclone air inlet and a cyclone air outlet, a dirt outlet spaced from the cyclone air inlet, a cyclone chamber wall and a longitudinal axis. The surface cleaning apparatus also includes a dirt collection chamber in communication with the dirt outlet. The dirt collection chamber has an openable wall mounted to the surface cleaning apparatus by a hinge and a centrally positioned longitudinal axis, the openable wall has a centre and a hinge side. The surface cleaning apparatus also includes a plate positioned at an interface of the dirt collection chamber and the cyclone. The plate is moveably mounted to the openable wall. The surface cleaning apparatus also includes a biasing member biasing the plate towards the hinge side of the openable wall a suction motor positioned in the air flow passage.

FIELD

The disclosure relates to surface cleaning apparatuses, such as vacuumcleaners. Particularly, the disclosure relates to a cyclone for surfacecleaning apparatuses having cyclone chamber, dirt collection chamber anda movable plate at the interface therebetween and/or an airflow conduitextending through the dirt collection chamber.

INTRODUCTION

The following is not an admission that anything discussed below is priorart or part of the common general knowledge of persons skilled in theart.

Various constructions for surface cleaning apparatus such as vacuumcleaners are known. Currently, many surface cleaning apparatus areconstructed using at least one cyclonic cleaning stage. The air is drawninto the vacuum cleaner through a dirty air inlet and conveyed to acyclone inlet. The rotation of the air in the cyclone results in some ofthe particulate matter in the airflow stream being disentrained from theairflow stream. This material is then collected in a dirt collectionchamber, which may be at the bottom of the cyclone or in a dirtcollection chamber exterior to the cyclone chamber (see for exampleWO2009/026709 and U.S. Pat. No. 5,078,761). One or more additionalcyclonic cleaning stages and/or filters may be positioned downstreamfrom the cyclone.

SUMMARY

The following summary is provided to introduce the reader to the moredetailed discussion to follow. The summary is not intended to limit ordefine the claims.

A surface cleaning apparatus is provided with at least one cyclone. Thecyclone has an associated dirt collection chamber and a plate or bottomfloor positioned at the dirt outlet of the cyclone. The dirt outlet maybe an annular gap around the plate or a gap between the plate and an endof the cyclone wall (e.g., a side or slot dirt outlet). In order toincrease the dirt collection capacity of the surface cleaning apparatus,the height of the dirt collection chamber may be increased. The increasein height permits additional dirt to accumulate in the dirt collectionchamber before the dirt collection chamber has to be emptied. In orderto permit the dirt collection chamber to be emptied, an openable wall,preferably an openable bottom wall is provided. In order to permit thecyclone chamber to also be opened, the floor or plate may be moveablymounted (i.e., the floor or plate may be attached to the openable wall.Therefore, when the wall is opened, the plate is moved out of its closedposition and material collected in the dirt collection chamber and thecyclone chamber may fall out. The plate may be mounted off centre of thedirt chamber and/or pivotally mounted to the openable wall. Accordingly,despite the height of the bin, the plate or floor may be movedsufficiently so that material may fall out of the cyclone chamber andthe dirt collection chamber essentially unimpeded.

A dirt collection chamber having an increased dirt capacity may also beprovided by positioning the dirt collection chamber at least partiallyunder the cyclone chamber and, preferably the dirt collection chambermay extend under the entire cyclone chamber. A surface cleaningapparatus, such as an upright vacuum cleaner may have the suction motorand the cyclone provided on the upper section. The cyclone is preferablyprovided above the suction motor so that the suction motor is at a lowerheight on the upper section, thereby reducing the hand weight of theupper section. In order to permit the air to flow to the suction motorfrom the cyclone with reduced back pressure, the cyclone air outlet mayextend through the dirt collection chamber (e.g., the cyclone air outletmay have an extension of the vortex finder extend through the dirtcollection chamber. In order to empty the dirt collection chamber, thebottom may be openable. The extension may be mounted to the cyclonechamber and remain in position when the bottom is opened. Alternately,the extension may be affixed to the bottom and therefore removed whenthe bottom is opened. Alternately, part may be affixed to the bottom andpart to the cyclone so that part of the extension is removed. It ispreferred that the extension is sealed on an angle when in the closedposition (e.g. 45 degrees).

According to one aspect, a surface cleaning apparatus comprises an airflow passage extending from a dirty air inlet to a clean air outlet. Thesurface cleaning apparatus also includes a cyclone positioned in the airflow passage. The cyclone has a cyclone air inlet and a cyclone airoutlet at one end of a cyclone chamber, a dirt outlet spaced from thecyclone air inlet, a cyclone chamber wall, and a centrally positionedlongitudinal axis. The surface cleaning apparatus also includes a dirtcollection chamber in communication with the dirt outlet. The dirtcollection chamber has an openable wall mounted to the surface cleaningapparatus by a hinge and a centrally positioned longitudinal axis, theopenable wall has a centre and a hinge side. The surface cleaningapparatus also includes a plate positioned at an interface of the dirtcollection chamber and the cyclone. The plate is moveably mounted to theopenable wall. The surface cleaning apparatus also includes a biasingmember biasing the plate towards the hinge side of the openable wall asuction motor positioned in the air flow passage.

In some examples the plate is mounted to the openable wall at a positionoff centre from the centrally positioned longitudinal axis of thecyclone.

In some examples the plate is mounted to the openable wall spaced fromthe centre of the openable wall and towards the hinge side.

In some examples the surface cleaning apparatus also includes a supportmember extending between the openable wall and the plate. The supportmember extends at an angle to the longitudinal axis of the cyclone.

In some examples the dirt outlet comprises a gap between the plate andthe cyclone chamber wall.

In some examples the dirt collection chamber has a longitudinallyextending wall and the plate has a perimeter that is spaced from atleast a portion of the longitudinally extending wall by a distance andthe distance varies.

In some examples the surface cleaning apparatus also includes anabutment member provided in the dirt collection chamber on the hingeside. The abutment member is positioned to interact with at least one ofthe plate and a moveable plate mount and move the plate in a directioncounter the a force exerted by the biasing member as the openable wallis closed.

In some examples the dirt collection chamber has a longitudinallyextending wall, a portion of which on the hinge side comprises theabutment member, and the plate has a perimeter that is spaced from aportion of the longitudinally extending wall and abuts the portion ofthe longitudinally extending wall that comprises the abutment memberwhen the openable wall is closed.

In some examples the abutment member comprises a rib provided on thelongitudinally extending wall of the dirt collection chamber.

In some examples the axis of the dirt collection chamber is spaced apartfrom the longitudinal axis of the cyclone chamber.

In accordance with another aspect, a surface cleaning apparatuscomprises an air flow passage, extending from a dirty air inlet to aclean air outlet, and a cyclone positioned in the air flow passage. Thecyclone has a cyclone air inlet at an inlet end of the cyclone, acyclone air outlet, a dirt outlet spaced from the cyclone air inlet at adirt outlet end of the cyclone and a cyclone chamber wall. The surfacecleaning apparatus also includes a dirt collection chamber, incommunication with the dirt outlet and having an openable wall, and aplate positioned at the dirt outlet end of the cyclone and moveablymounted to the openable wall. The surface cleaning apparatus alsoincludes a suction motor positioned in the air flow passage.

In some examples the surface cleaning apparatus further comprises abiasing member biasing the plate towards a sidewall of the dirtcollection chamber.

In some examples the surface cleaning apparatus further comprises anabutment member positioned in the dirt collection chamber and engageablewith at least one of the plate and a plate mount whereby, when theopenable wall is closed, the abutment member positions the plate at apreset position.

In some examples the dirt collection chamber has a longitudinallyextending wall and the plate has a perimeter that is spaced from aportion of the longitudinally extending wall by a distance and thedistance varies.

In some examples a portion of the longitudinally extending wallcomprises the abutment member and the plate abuts the abutment memberwhen the openable wall is closed.

In some examples the openable wall is moveably mounted to the surfacecleaning apparatus, the openable wall has a centre and a hinge side, andthe plate is mounted to the openable wall spaced from the centre andtowards the hinge side.

In some examples the surface cleaning apparatus also comprises a platemount provided on the openable wall and the plate mount is positionedspaced from a centrally positioned longitudinal axis of the cyclone.

In some examples each of the dirt collection chamber and the cyclone hasa centrally positioned longitudinal axis and the axes are spaced apart.

In some examples the surface cleaning apparatus further comprises asupport member extending between the openable wall and the plate and thesupport member extends at an angle to a longitudinal axis of thecyclone.

In some examples the dirt outlet comprises a gap between the plate andthe cyclone chamber wall.

In some examples the cyclone air outlet is at the inlet end of thecyclone.

In accordance with another aspect, a surface cleaning apparatuscomprises an air flow passage extending from a dirty air inlet to aclean air outlet and a cyclone positioned in the air flow passage. Thecyclone has a cyclone air outlet at one end of a cyclone chamber, a dirtoutlet spaced from the cyclone air outlet and a cyclone chamber wall.The surface cleaning apparatus also includes a dirt collection chamberin communication with the dirt outlet and a suction motor positioned inthe air flow passage downstream from the cyclone. The air flow passagecomprises a portion that extends from the cyclone air outlet to thesuction motor, the portion comprises a conduit that extends through thedirt collection chamber.

In some examples the dirt collection chamber extends under the end ofthe cyclone having the air outlet.

In some examples the conduit is an extension of the vortex finder.

In some examples the cyclone air inlet is positioned at the same end ofthe cyclone as the cyclone air outlet.

In some examples the dirt collection chamber is external to the cyclone.

In some examples the dirt collection chamber surrounds a portion of thecyclone.

In some examples the dirt collection chamber has an openable end wall.Optionally, the openable end wall has the conduit provided thereon andthe conduit is removed from the dirt collection chamber when theopenable end wall is opened.

In some examples the surface cleaning apparatus further comprises anopenable seal between the conduit and the cyclone.

In some examples the conduit is mounted to the cyclone and extends fromthe cyclone to the openable end wall.

In some examples the surface cleaning apparatus also includes anopenable seal between the conduit and the openable end wall.

In some examples the openable seal is in a plane at an angle to thedirection of air flow through the conduit.

In some examples the dirt collection chamber has two opposed openableend walls.

DRAWINGS

Reference is made in the detailed description to the accompanyingdrawings, in which:

FIG. 1 is a front isometric view of a surface cleaning apparatus;

FIG. 2 is an isometric view of a filtration member housing of thesurface cleaning apparatus of FIG. 1;

FIG. 3 is a section view of a filtration member housing of the surfacecleaning apparatus of FIG. 1, taken along line 3-3;

FIG. 4 is the section view of FIG. 3 showing an openable wall in anexample of an open position;

FIG. 5 is the section view of FIG. 3 showing an openable wall in anotherexample of an open position;

FIG. 6 is the isometric view of FIG. 2 showing an openable wall inanother example of an open position;

FIG. 7 is a partial section view of the filtration member housing ofFIG. 2 with an openable wall in a closed position;

FIG. 8 is a partially exploded view of the filtration member housing ofFIG. 2;

FIG. 9 is a section view of another example of a filtration memberhousing for the surface cleaning apparatus of FIG. 1, with an openablewall in a closed position;

FIG. 10 is the section view of FIG. 9 showing the openable wall memberin an open position;

FIG. 11 is a partial cut-away view of another example of a filtrationmember housing;

FIG. 12 is a section view taken along line 12-12 in FIG. 11, with theopenable wall member in a closed position;

FIG. 13 is the section view of FIG. 12, with the openable wall member inan open position;

FIG. 14 is a partial cut-away view of another example of a filtrationmember housing;

FIG. 15 is a section view taken along line 15-15 in FIG. 14, with theopenable wall in an open position;

FIG. 16 is a partial cut-away view of another example of a filtrationmember housing;

FIG. 17 is a section view taken along line 17-17 in FIG. 16, with theopenable wall in a closed position; and

FIG. 18 is the section view of FIG. 17, with the openable wall in anopen position.

DETAILED DESCRIPTION

Referring to FIG. 1, a first embodiment of a surface cleaning apparatus100 is shown. In the embodiment shown, the surface cleaning apparatus100 is an upright vacuum cleaner. In alternate embodiments, the surfacecleaning apparatus may be another suitable type of surface cleaningapparatus, such as a canister type vacuum cleaner, and hand vacuumcleaner, a stick vac, a wet-dry type vacuum cleaner or a carpetextractor.

Referring still to FIG. 1, the surface cleaning apparatus 100 has adirty air inlet 102, a clean air outlet 104, and an air flow passageextending therebetween. In the embodiment shown, the dirty air inlet 102is provided in a surface cleaning head 106. From the dirty air inlet102, the airflow passage extends through the surface cleaning head 106,and through an air conduit 108, to a suction and filtration unit 110.The clean air outlet 104 is provided in the suction and filtration unit110. Optionally, the suction and filtration unit 110 can be releasablymounted to the supporting structure of the surface cleaning apparatus100. The releasable connection between the suction and filtration unit110 and the supporting structure can be of any suitable type, and canoptionally including locking means for securing the suction andfiltration unit 110 in place.

In the embodiment shown, the air conduit 108 includes a pivoting jointmember 112 connected to the surface cleaning head 106, a lower upflowduct 114, and an upper upflow duct 116 and a flexible hose 117, inairflow communication with the suction and filtration unit 110. Inalternate embodiments, the air conduit 108 may be of anotherconfiguration. For example, only a pivoting joint member 112, a lowerupflow duct 114, and an elbow joint 118 may be provided.

A handle 119 is mounted to the upper upflow duct 116, to allow a user tomanipulate the surface cleaning apparatus 100 and maneuver the surfacecleaning head 106 across a surface to be cleaned, for example a floor.

The suction and filtration unit 110 includes a filtration member housing120, and a suction motor housing 122. The filtration member housing 122houses filtration member, for example a cyclone, which is positioned inthe airflow passage downstream of the dirty air inlet 102 for removingparticulate matter from air flowing through the airflow passage. Thesuction motor housing 122 houses a suction motor (not shown), which isprovided in the airflow passage downstream of the cyclone for drawingair through the airflow passage.

In the embodiment shown, as the suction motor housing 122 is mounted tothe lower upflow duct 114, and the filtration member housing 120 isremovably mounted to the suction motor housing 122 above the suctionmotor housing 122, the filtration member housing 120 may optionally besecured to the suction motor housing 122 using one or more latches orlocking members (not shown). In such instances the filtration memberhousing 120 can be detached from the suction motor housing by unlatchingthe one or more latch members, and lifting the filtration member housing120 off of the suction motor housing 122. When this is done, thefiltration member housing 120 will be generally sealed, except for anyairflow passages leading to or from the filtration member housing 120,and the top of the suction motor housing 122 will be open. The top ofthe suction motor housing 122 may be covered with a suitable pre-motorfilter positioned upstream of the suction motor and downstream of thecyclone. The suction motor housing 122 may also include a post-motorfilter downstream of the suction motor and upstream of the clean airoutlet. The post-motor filter may be any suitable type of filter, suchas, for example, a HEPA filter.

In one embodiment, as exemplified in FIGS. 2-8, the filtration memberhousing 120 includes a sidewall 130, a top wall 132, and a bottom wall134. In the embodiment shown, the filtration member, or cyclone, housedin the filtration member housing 120 is a cyclone 144. In alternateembodiments, the filtration member may be, for example, a filter, suchas a filter bag or a foam filter. In further alternate embodiments, thefiltration member may include a plurality of cyclones, or a plurality ofcyclonic stages.

The cyclone 144 may be of any suitable configuration. In the embodimentshown, the cyclone 144 extends along a longitudinal axis 146, which isgenerally vertically extending, and includes a generally cylindricalcyclone wall 148, which defines a cyclone chamber 150. Some or all ofthe cyclone wall 148 can coincide with portions of the side walls 130,as exemplified, for example in FIGS. 3 and 4. Alternatively, in someexamples the cyclone wall 148 can be distinct from the side walls 130.

The cyclone 144 is positioned in the air flow passage and has a cycloneair inlet 162 in fluid communication with a cyclone air outlet 164 atone end, for example the upper end 152 of the cyclone chamber 150. Thecyclone 144 also includes a cyclone dirt outlet 166 spaced from thecyclone air inlet 162. In the embodiment shown, the cyclone dirt outlet166 is disposed beneath the open bottom end 154 of the cyclone chamber150 and is generally opposite the cyclone air outlet 164.

In use, dirty air (i.e. air containing entrained dirt particles andother debris) enters the cyclone chamber 150 via the cyclone air inlet162. Once in the cyclone chamber 150 the air circulates in a cyclonicmanner which causes dirt particles and debris in the air to contact thecyclone chamber wall 148, separating the dirt and debris from the airflow. The relatively clean air is drawn from the cyclone chamber 150,upwards through the cyclone air outlet 164 while the dirt and debrisfalls downward under the force of gravity and exits the cyclone dirtoutlet 166.

The filtration member housing 120 also includes a dirt collectionchamber 160 that is in fluid communication with the cyclone dirt outlet166, for receiving and storing the dirt and debris separated from theair flow using the cyclone 144. The dirt chamber 160 includes anopenable wall 170 that is pivotally connected to the filtration memberhousing 120 by a hinged joint 172. In some examples, the openable wall170 of the dirt collection chamber 160 also forms the bottom wall 134 ofthe filtration member housing 120. In other examples, a separate,movable bottom wall 134 can be included beneath the openable wall 170.In the embodiment shown, the openable wall 170 is generally centrallypositioned about the longitudinal axis 218 and defines a centre (forexample the geometric centre) that separates a hinge side 174 from anopposing latchable side 176. Opening the openable wall 170 enables auser to empty the accumulated dirt and debris from the dirt collectionchamber 160.

The openable wall 170 can be held in its closed position by any suitablemeans including a friction fit, clips, clamps or one or more latches. Asexemplified in FIGS. 3-8, one example of a suitable latch includesinternal latch member 200, mounted to openable wall 170, that isconfigured to engage shoulder 202. Latch member 200 can be resilientlybiased toward the engaged position, as exemplified in FIG. 3, and whenengaged with complimentary should 202, can retain the openable wall 170in its closed position. When a user wishes open the openable wall 170, auser can depress actuator 204 thereby causing linkage member 206 totranslate downward (as shown in FIG. 3), causing a correspondinghorizontal deflection (as seen in FIG. 3) of latch member 200, therebydisengaging latch member 200 from shoulder 202. Due to the resilientnature of latch member 200, it will automatically re-engage shoulder 202when the openable wall 170 is returned to the closed position. In thisexample the latch member 200 also serves as a plate mount, as describedin more detail.

In another example, exemplified in FIGS. 9-10, the latch may be anexternal latch 208, of any suitable type known in the art, that can bedirectly accessed by the user.

A deflector or arrester plate is positioned at the interface between thedirt collection chamber 160 and the cyclone 144, for example deflectorplate 180 positioned beneath cyclone chamber 150, defining a gap thatforms cyclone dirt outlet 166. The deflector plate 180 serves to deflectand re-direct dirt and debris exiting the cyclone chamber 150 toward thedirt collection chamber 160. In the present embodiment, a dirt inlet 168for the dirt collection chamber 160, through which dirt and debris canenter the dirt collection chamber 160, comprises the generally annularspace or gap between the peripheral edge 182 of the deflector plate 180and the inner surface of the side wall 130. In other examples, the dirtinlet for the dirt collection chamber 160 may be any other suitableconfiguration.

The deflector plate 180 is mounted to, and supported apart from, theopenable wall 170 by a support member, for example a strut 188. Thestrut 188 may be any type of suitable structural member that is capableof supporting the deflector plate 180 and resisting any stresses exertedon the deflector plate 180 by the air flow or dirt particles passingexiting the cyclone 144. The strut 188 can be connected to the openablewall 170 using any suitable plate mount member, for example pin joint190. In this example the pin joint 190 also comprises the latch member200.

In this configuration, the deflector plate 180 also forms the upper wallof the dirt chamber 160. The capacity of the dirt collection chamber 160(i.e. the volume of dirt that can be stored in the chamber while thesurface cleaning apparatus 100 is in use) can be based on the verticaldistance 184 between the deflector plate 180 and the openable bottomwall 170. The dirt collection chamber 160 also has at least onelongitudinally (vertically as shown) extending wall 210. In someinstances the longitudinally extending wall 210 can form a portion ofthe side walls 130. The deflector plate has a perimeter that is spacedfrom at least a portion of the longitudinally extending wall 210 of thedirt collection chamber 160 by a distance 212, and the distance 212varies along the perimeter of the deflector plate 180.

In addition to determining the dirt chamber 160 capacity, the position,size and shape of the deflector plate 180 relative to the cyclonechamber 150 can affect the performance and characteristics of thecyclone 144 in use. In the present embodiment, the deflector plate 180is substantially the same size and shape as the bottom end 154 of thecyclone chamber 150, and is positioned to overlie substantially all ofthe cyclone dirt outlet 166. In this configuration substantially all ofthe dirt exiting the cyclone chamber can contact the deflector plate 180and be directed to dirt inlet 168.

One method of increasing the capacity of the dirt chamber 160 (therebyincreasing the vacuum time between stops to empty the chamber) is toincrease the distance 184 between the deflector plate 180 and theopenable wall 170, for example by lengthening strut 188. However, inexisting examples where the deflector plate was fixedly connected to theopenable wall, capacity of the dirt chamber could be limited becauseincreasing the length of strut 188 would result in jamming orinterference between the deflector plate 180 and the side walls 130 ofthe filtration member housing 120 when the openable wall 170 is opened.

In the present example, the strut 188 is fixedly connected to thedeflector plate 180 and is movably coupled to the openable plate 170 bypin joint 190 (or any other suitable pivotable coupling), which enablesthe deflector plate 180 to pivot relative to the openable plate 170, asexemplified in FIGS. 4 and 5. The pivotable connection between the strut188 and the openable wall 170 allows the deflector plate 180 to bespaced further apart from the openable wall 170, which can increase dirtchamber capacity, and enables the deflector plate 180 to be properlypositioned relative to the cyclone chamber 150, while still allowing theopenable wall 170 to be opened without causing jamming between thedeflector plate 180 and the side walls 130.

In the present example, the deflector plate 180 is configured tosubstantially overlie the cyclone dirt outlet 166, as described above.To keep the deflector plate 180 in the desired position, in alignmentwith the cyclone chamber 150, the pivot joint 190 between the strut 188and openable wall 170 is biased using a biasing member, for example atorsion spring 192 surrounding a pin 194 (FIG. 8). The torsion spring192 is configured to continuously bias the deflector plate 180 towardsthe hinge side 174 of the openable wall 170, as illustrated in FIGS. 3,4 and 5, so that the deflector plate 180 contacts an abutment member orabutment surface within the filtration member housing 120.

In the embodiment shown, an abutment member, for example ribs 214 areprovided in the dirt collection chamber 160 on the hinge side 174 forcontacting the deflector plate 180. In this example, the ribs 214 formpart of the longitudinally extending wall 210 and are positioned tointeract with at complimentary abutment notches 216 formed on theperimeter of the deflector plate 180. In other examples, the abutmentmember can be another rib or different feature on the dirt chamber wall210, a member that does not form part of wall 210 or an external elementor stopper inserted into the dirt chamber 160. Optionally, the abutmentmember can be configured to contact the deflector plate, the supportstrut 188 or both to counter the force exerted by the biasing member asthe openable wall 170 is moved, for example opened or closed.

When the openable wall 170 is in its closed position, as exemplified inFIGS. 3 and 7, the biasing force of the torsion spring 192 forces thedeflector plate 180 into its desired position, or present position,beneath the cyclone dirt outlet 166, contacting the side wall 130. Asthe openable wall 170 moves into an intermediary position, asexemplified in FIGS. 2 and 4, the biasing force of the torsion spring192 keeps the deflector plate 180 disposed toward the hinge side 174 ofthe openable wall 170, contacting an abutment member, i.e. side wall130, within the dirt collection chamber 160.

As exemplified in FIGS. 2-8, in a preferred example the deflector plate180 is mounted to the openable wall 170 at a position off centre fromthe centrally positioned longitudinal axis 146 of the cyclone 144.Referring to FIG. 3, the pin joint connection 190 between the strut 188and the openable wall 170 is offset from the axes 146, 218 and isdisposed on the latchable side 176 of the openable wall 170, away fromthe hinge side 174 and hinge 172.

In examples where the pin joint 190 is off-centre, away from the hingeside 174, the strut 188, or any other suitable support member used toconnect the deflector plate 180 to the openable wall 170, extends at anangle 196 to the longitudinal axis 146 of the cyclone when the openablewall 170 is in its closed position, as exemplified in FIG. 3. The angle196 can be any suitable angle that enables the deflector plate 180 to bedisposed in its in use position beneath the cyclone 144 when theopenable wall 170 is closed, and enables the openable wall 170 to beopened without being jammed the deflector plate 180. The suitable angle196 may be selected based on a number of factors including, for example,the configuration of the deflector plate 180, the cyclone chamber 150,the dirt collection chamber 160, the side walls 130 and any combinationthereof. In some examples, angle 196 can be between 15 and 90 degrees.In other examples the angle 196 can be between 60 and 80 degrees.

As exemplified in FIG. 3, the dirt collection chamber has a dirt chamberaxis 218 that extends through the centre of the openable wall 170.Optionally, as exemplified, the dirt chamber axis 218 is spaced apartfrom the longitudinal axis 146 of the cyclone chamber 150.

Generally, the dirt collection chamber 160 can be emptied by opening theopenable wall 170 to an intermediate position, as exemplified in FIG. 2,4 or 5, in which the interior of the dirt collection chamber 160 isexposed but the deflector plate 180 remains at least partially withinthe dirt collection chamber 160. In such a position, the deflector plate180 is held in contact with the abutment members inside the dirtcollection chamber 160 by the biasing force exerted by the torsionspring 192. In some instances, a user may wish to remove the deflectorplate 180 from the dirt collection chamber 160 entirely, for example toaccess or service the cyclone chamber 150. In these examples, theopenable plate 170 can be moved to a fully open position, as exemplifiedin FIG. 6, in which the deflector plate 180 can be completely removedfrom the dirt collection chamber 160.

Referring to FIGS. 9 and 10, another embodiment of the filtration memberhousing 120 is illustrated having a plate mount member, pin joint 190,that is disposed on the openable wall 170 so that the pin joint 190 isgenerally centered beneath the deflector plate 180 when the openablewall 170 is closed. In this embodiment, the angle 220 formed between thestrut 188 and the openable wall 170, when the openable wall 170 isclosed, is approximately 90 degrees. When the pin joint 190 is locateddirectly beneath the deflector plate 180 as exemplified, it can belocated off-centre, on the hinge side 174 of the openable plate 170, onthe hinge side 174.

Referring to FIGS. 11-13, another embodiment of a filtration memberhousing 120 comprises includes a sidewall 130, a top wall 132, and abottom wall 134. In the embodiment shown, the filtration member, orcyclone, housed in the filtration member housing 120 is a cyclone 144.In alternate embodiments, the filtration member may be, for example, afilter, such as a filter bag or a foam filter. In further alternateembodiments, the filtration member may include a plurality of cyclones,or a plurality of cyclonic stages.

The cyclone 144 may be of any suitable configuration. In the embodimentshown, the cyclone 144 extends along a longitudinal axis 146, which isgenerally vertically extending, and includes a generally cylindricalcyclone wall 148, which defines a cyclone chamber 150. The cyclone wall148 is distinct from the side walls 130. In some examples, some or allof the cyclone wall 148 can coincide with portions of the side walls130.

The cyclone 144 is positioned in the air flow passage and has a cycloneair inlet 162 in fluid communication with a cyclone air outlet 164 thatpasses through one end, for example the lower end 154 of the cyclonechamber 150. The cyclone 144 also includes a cyclone dirt outlet 166spaced from the cyclone air inlet 162. In the embodiment shown, thecyclone dirt outlet 166 is disposed toward the upper end 152 of thecyclone chamber 150 and is generally defined by gap between an upperportion of the cyclone wall 148 and an inner surface of the top wall132. In this example, the inner surface of the top wall 132 forms thedeflector plate 180 that contacts dirt exiting the cyclone chamber 150and directs it toward the cyclone dirt outlet 166.

In use, dirty air (i.e. air containing entrained dirt particles andother debris) enters the cyclone chamber 150 via the cyclone air inlet162. Once in the cyclone chamber 150 the air circulates in a cyclonicmanner which causes dirt particles and debris in the air to contact thecyclone chamber wall 148, separating the dirt and debris from the airflow. The relatively clean air is drawn from the cyclone chamber 150,downwards through the cyclone air outlet 164 while the dirt and debrisis moved upwards under the force of cyclonic air flow and exits thecyclone chamber 150 via the cyclone dirt outlet 166.

In this example, the cyclone air outlet 164 comprises a hollow air flowconduit, for example vortex finder 222 that extends into the cyclonechamber 150 a suitable height 224 above the lower end 154. The height224 can be any height that provides the desired cyclonic air flowpattern within the cyclone chamber 150 and can be based on a pluralityof factors including, for example, air flow speed and cyclone chamberdimensions. To inhibit dirt and other debris from entering the cycloneair outlet 164 (and continuing into the suction motor) the vortex finder222 may be covered with an air-permeable protective cover or screen, forexample a wire mesh filter 226, configured to block the passage of dirtparticles and debris. The protective cover can be any suitable coverknown in the art.

In this configuration, the cyclone air inlet 162 is positioned at thesame end of the cyclone as the cyclone air outlet 164; toward the lowerend 154 of the cyclone chamber 150 as exemplified in FIG. 11. In otherexamples the cyclone air inlet 162 may be disposed at a different endthan the cyclone air outlet 164.

The filtration member housing 120 also includes a dirt collectionchamber 160 that is in fluid communication with the cyclone dirt outlet166, for receiving and storing the dirt and debris separated from theair flow using the cyclone 144. In this example, at least a portion ofthe dirt collection chamber 160 is disposed beneath the lower end 154 ofthe cyclone chamber 150. Optionally, at least a portion of the generallyannular space or gap formed between the cyclone wall 148 and the sidewall 130 can also form part of the dirt collection chamber 160. In suchexamples, the dirt collection chamber 160 may surround, or at leastpartially surround the vortex chamber 150.

In this example, a portion of the dirt collection chamber 160 liesbeneath the cyclone air outlet 164. To complete the portion of the airflow pathway fluidly linking the cyclone air outlet 164 to the suctionmotor (not shown), an air flow conduit, for example conduit 228 extendsthrough the dirt collection chamber 160, fluidly connecting the cycloneair outlet 164 with an opening, for example aperture 230, in the bottomwall 134 of the filtration member housing 120. As exemplified in FIGS.11-13 the conduit 228 is a generally cylindrical, rigid conduit that isgenerally straight. In other examples the conduit 228 may be of anysuitable shape and size, including curved, and may be at least partiallyflexible. Optionally, the conduit 228 can be formed from a semi-rigid orflexible material, for example rubber or polymer, that has some degreeof flexibility while still providing sufficient structural stiffness tokeep the conduit 228 upstanding and to resist any forces exerted by dirtor debris in the dirt collection chamber.

The dirt chamber 160 includes an openable wall 170 that is pivotallyconnected to the filtration member housing 120 by a hinged joint 172. Insome examples, the openable wall 170 of the dirt collection chamber 160also forms the bottom wall 134 of the filtration member housing 120. Inother examples, a separate, movable bottom wall 134 can be includedbeneath the openable wall 170. In the embodiment shown, the openablewall 170 defines a centre (for example the geometric centre) thatseparates a hinge side 174 from an opposing latchable side 176. Openingthe openable wall 170 enables a user to empty the accumulated dirt anddebris from the dirt collection chamber 160. In examples where thebottom wall 134 is separate from the openable wall 170 that forms thelower wall of the dirt collection chamber 160, the conduit 228 canextend through both bottom wall 134 and the openable wall 170 tocomplete the desired airflow pathway.

The openable wall 170 can be held in its closed position by any suitablemeans including a friction fit, clips, clamps or one or more latches. Asexemplified in FIGS. 11-13, the latch may be an external latch 208, ofany suitable type known in the art, that can be directly accessed by theuser.

When the openable wall 170 is in the closed position, as exemplified inFIGS. 11 and 12, the conduit 228 provides a generally air-tight air flowpathway between the vortex finder 222 and the aperture 230, to inhibitdirt particles from the dirt collection chamber 160 from re-entering theair flow pathway. To facilitate opening of the openable wall 170 theconduit 228 is configured to provide a releasable, re-sealableconnection between the vortex 222 and the aperture 230 that provides thedesired air-tight conduit when the openable wall 170 is closed whilestill allowing the openable wall 170 to be opened to empty the dirtcollection chamber 160.

In this example, as exemplified in FIGS. 11-13 the conduit 228 ismounted to the cyclone 144, for example to the lower end of the cyclonechamber 150, and extends from the cyclone to the openable endwall 170.The conduit 228 is integrally formed with, and forms a continuousextension of, the vortex finder 222 that provides a seamless air flowpath from the cyclone air outlet 164 to the aperture 230. In otherexamples the conduit 228 can be a separate member connected to thecyclone chamber 150

The lower end of the conduit 228 can be sealed to the aperture 230 usingany suitable, openable sealing or gasketing member, such as an o-ring orrubber gasket 232, that can provide the desired air-tight connection.The gasket 232 is preferably re-usable and re-sealable so the openablewall 170 can be opened and closed several times without substantiallycompromising the operation of the gasket 232. In this example, theconduit 228 is fixed to the vortex housing 150 and does not move orpivot when the openable door 170 is opened, as exemplified in FIG. 13.

Referring to FIGS. 14 and 15, in another example, the conduit 228 may befixedly connected to, or integrally formed with, the openable wall 170as opposed to the cyclone chamber 150. As exemplified, the conduit 228can be integrally formed with the openable wall 170 or, in otherexamples, can be fixedly coupled to the openable wall 170 using anysuitable coupling means, including, for example, adhesives, welding,threaded connections and snap-fits. In this configuration, when theopenable wall 170 is moved to its open position, as exemplified in FIG.15, the conduit 228 is removed from the dirt collection chamber 160. Inthis example, the connection between the conduit 228 and the vortexfinder 222 (or any other suitable portion of the cyclone 144) may beprovided with a suitable, openable sealing member or gasket to providethe desired air-tight connection when the openable wall 170 is closed.Optionally (in any of the examples described herein), the conduit 228can be a self-sealing conduit that formed from a material that cancreate the desired seal with the cyclone chamber 150 or openable wall170. For example, the conduit 228 can be formed from a rubber or polymercomposition such that an end face of the conduit itself serves as agasketing member.

Referring to FIGS. 16-18, in another example the conduit 228 maycomprise two or more portions, for example lower portion 234 and upperportion 236, that are configured to sealing connect with each other toprovide the air flow pathway. For example, the conduit 228 has an upperportion 236 fixed to the cyclone chamber 150 and a lower portion 234fixed to the openable wall 170. The two portions 234, 236 of the conduit228 are complimentary and are releasably sealable to each other toprovide the desired air-tight conduit 228. In this example, the upperportion 236 of the conduit 228 may remain in the dirt collection chamber160 when the openable wall 170 is opened, while the lower portion of theconduit 228 moves with the openable wall 170, out of the dirt collectionchamber 160, as exemplified in FIG. 18.

In this example, the upper and lower portions 234, 236 can be formedfrom the same material or different materials. If the upper and lowerportions 234, 236 are formed from the same, rigid material a gasketingmember can be provided at the intersection of upper and lower portions234, 236 to create an air-tight seal. Alternatively, as exemplified inFIGS. 16-18, the upper and lower portions 234, 236 can be formed formdifferent materials. In the present example, the upper portion 236 isformed from the same, generally rigid material that is used to form thecyclone chamber 150, for example plastic. The lower portion 234 isformed from a more flexible, rubber material that is self-gasketing,i.e. is capable of forming an air-tight seal with the material of theupper portion 236. Optionally, the lower portion 234 includes anupstanding collar portion 238 that has outwardly projecting sealingmembers, for example ribs 240. The collar portion 238 is sized to fitwithin the downstream end of the upper portion 236, and the ribs 240extend radially outward to create an air-tight, sealed connection. Inother examples, any other suitable sealing mechanism can be used.Further, in some examples the upper portion 236 can be formed from theresilient, gasketing material and the lower portion 234 can be a rigidmember.

In any of the described examples, the sealing portions of the conduit228 can lie in a sealing plane 242. In some examples, as exemplified inFIGS. 11-15, the sealing plane 242 is generally orthogonal to the lengthof the conduit 228 or to axis 146 (e.g. comprising generally circularsealing faces if the conduit 228 is cylindrical). In other examples, asexemplified in FIGS. 16-18, the sealing plane 242, i.e. a planecontaining the sealing surfaces of the conduit 228, can be at an angleto the direction of the air flow through the conduit 228, which isgenerally in the direction of axis 146. In this example, the sealingsurfaces may comprise elliptical or generally arcuate faces.

Optionally, as exemplified in FIGS. 11-18, both the top wall 132 and thebottom wall 134 of the filtration member housing 120 can be openable. Insuch examples, both the top and bottom walls 132, 134 can be movablyconnected to the housing 120, for example using hinges 172, and can besecurable in their closed position using any suitable means, for examplelatches 208. As exemplified, the dirt collection chamber 160 maybe influid communication with both the top and bottom walls 132, 134providing the dirt collection chamber 160 with two opposed, openable endwalls 132, 134. This configuration may provide a user with greaterflexibility when emptying the dirt collection chamber 160 and mayprovide access for inspection and servicing of the dirt collectionchamber 160 and the vortex chamber 150. An openable top wall 132 may beincorporated in any of the examples described herein.

Various apparatuses or methods are described above to provide an exampleof each claimed invention. No example described above limits any claimedinvention and any claimed invention may cover processes or apparatusesthat are not described above. The claimed inventions are not limited toapparatuses or processes having all of the features of any one apparatusor process described above or to features common to multiple or all ofthe apparatuses described above.

1-34. (canceled)
 35. A surface cleaning apparatus comprising: (a) an airflow passage extending from a dirty air inlet to a clean air outlet; (b)a cyclone positioned in the air flow passage and having a cyclone airinlet, a cyclone air outlet provided in a wall of the cyclone, a dirtoutlet and a cyclone chamber wall; (c) a dirt collection chamber incommunication with the dirt outlet; (d) a suction motor positioned inthe air flow passage; and, (e) the air flow passage comprises a portionextending from the cyclone air outlet to the suction motor wherein theportion comprises a conduit that extends through the dirt collectionchamber.
 36. The surface cleaning apparatus of claim 35 wherein the wallcomprises an end wall of the cyclone.
 37. The surface cleaning apparatusof claim 36 wherein the dirt collection chamber has an end wall that isspaced from and faces the end wall of the cyclone whereby a portion ofthe dirt collection chamber is positioned between the end wall of thecyclone having the air outlet and the end wall of the dirt collectionchamber.
 38. The surface cleaning apparatus of claim 37 wherein theconduit extends through the dirt collection chamber to an opening in theend wall of the dirt collection chamber.
 39. The surface cleaningapparatus of claim 38 wherein, in use, the cyclone is positioned abovethe dirt collection chamber end wall whereby the dirt collection chamberend wall defines a dirt collection surface that is spaced from and facesthe end wall of the cyclone.
 40. The surface cleaning apparatus of claim35 wherein the conduit is an extension of a vortex finder.
 41. Thesurface cleaning apparatus of claim 35 wherein the cyclone air inlet ispositioned at the wall of the cyclone.
 42. The surface cleaningapparatus of claim 35 wherein the dirt collection chamber is external tothe cyclone.
 43. The surface cleaning apparatus of claim 42 wherein thedirt collection chamber surrounds a portion of the cyclone.
 44. Thesurface cleaning apparatus of claim 35 wherein the end wall of the dirtcollection chamber is openable.
 45. The surface cleaning apparatus ofclaim 44 wherein the openable end wall has the conduit provided thereonand the conduit is removed from the dirt collection chamber when theopenable end wall is opened.
 46. The surface cleaning apparatus of claim45 further comprising an openable seal between the conduit and thecyclone.
 47. The surface cleaning apparatus of claim 44 wherein conduitis mounted to the cyclone and extends from the cyclone to the openableend wall.
 48. The surface cleaning apparatus of claim 47 furthercomprising an openable seal between the conduit and the openable endwall.
 49. The surface cleaning apparatus of claim 47 wherein theopenable seal is in a plane at an angle to the direction of air flowthrough the conduit.
 50. The surface cleaning apparatus of claim 35wherein the dirt collection chamber has two opposed openable end walls.51. The surface cleaning apparatus of claim 35 wherein the cyclone airoutlet is provided at one end of the cyclone chamber and the dirt outletis spaced from the cyclone air outlet.
 52. The surface cleaningapparatus of claim 35 wherein the cyclone and the dirt collectionchamber are positioned above the suction motor.